I think this is fantastic. Kiri and Orion love paper rolls. And I never made balls or brooms out of them. But I invented a 5th game:
Paw Skills
You need 6 toilet paper rolls and glue them together in pyramid shape:
3 parallel for the first floor, 2 parallel for second floor and one for third.
Then hide treats in the rolls and watch the techniques your cats develop for getting them